Man that sucks. I don't know what you should do, but all I know is that I had a remote control tank when I was little and the older kid that lived down the street convinced me to drive it through a ditch full of water (he said tanks were meant to go through water), and it was never the same after that. I loved that tank.....you could even control the cannon and it would make a noise and light up a little light when you pushed the fire button. And of couse there was no way I could get a new one because it came straight from the North Pole.

If I were you, first I'd go for an hour drive (if you have the free time) and see if it still has any problems.